<p>An evidence describes the source of an annotation, e.g. an experiment that has been published in the scientific literature, an orthologous protein, a record from another database, etc.</p>
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UniProtKB - Q80243
(Q80243_9HIV1)

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Virion infectivity factor

vif

<p>The annotation score provides a heuristic measure of the annotation content of a UniProtKB entry or proteome. This score <strong>cannot</strong> be used as a measure of the accuracy of the annotation as we cannot define the ‘correct annotation’ for any given protein.<p><a href='/help/annotation_score' target='_top'>More...</a></p>-Experimental evidence at transcript leveli
<p>This indicates the type of evidence that supports the existence of the protein. Note that the ‘protein existence’ evidence does not give information on the accuracy or correctness of the sequence(s) displayed.<p><a href='/help/protein_existence' target='_top'>More...</a></p>

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Counteracts the innate antiviral activity of host APOBEC3F and APOBEC3G. Forms a complex with host APOBEC3F and APOBEC3G thus preventing the entry of these lethally hypermutating enzymes into progeny virions. Recruits an active E3 ubiquitin ligase complex composed of elongin BC, CUL5, and RBX2 to induce polyubiquitination of APOBEC3G and APOBEC3F. In turn, they are directed to the 26S proteasome for degradation. Vif interaction with APOBEC3G also blocks its cytidine deaminase activity in a proteasome-independent manner, suggesting a dual inhibitory mechanism. May interact directly with APOBEC3G mRNA in order to inhibit its translation. Seems to play a role in viral morphology by affecting the stability of the viral nucleoprotein core. Finally, Vif also contributes to the G2 cell cycle arrest observed in HIV infected cells.UniRule annotation

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Miscellaneous

HIV-1 lineages are divided in three main groups, M (for Major), O (for Outlier), and N (for New, or Non-M, Non-O). The vast majority of strains found worldwide belong to the group M. Group O seems to be endemic to and largely confined to Cameroon and neighboring countries in West Central Africa, where these viruses represent a small minority of HIV-1 strains. The group N is represented by a limited number of isolates from Cameroonian persons. The group M is further subdivided in 9 clades or subtypes (A to D, F to H, J and K).UniRule annotation

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Required for replication in 'nonpermissive' cells, including primary T-cells, macrophages and certain T-cell lines, but is dispensable for replication in 'permissive' cell lines, such as 293T cells. In nonpermissive cells, Vif-defective viruses can produce virions, but they fail to complete reverse transcription and cannot successfully infect new cells.UniRule annotation

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Vif-defective viruses show catastrophic failure in reverse transcription due to APOBEC-induced mutations that initiate a DNA base repair pathway and compromise the structural integrity of the ssDNA. In the absence of Vif, the virion is morphologically abnormal.UniRule annotation

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywordsi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>This section provides information about the protein and gene name(s) and synonym(s) and about the organism that is the source of the protein sequence.<p><a href='/help/names_and_taxonomy_section' target='_top'>More...</a></p>Names & Taxonomyi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides an exhaustive list of all names of the protein, from commonly used to obsolete, to allow unambiguous identification of a protein.<p><a href='/help/protein_names' target='_top'>More...</a></p>Protein namesi

Recommended name:

Virion infectivity factorUniRule annotation

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section indicates the name(s) of the gene(s) that code for the protein sequence(s) described in the entry. Four distinct tokens exist: ‘Name’, ‘Synonyms’, ‘Ordered locus names’ and ‘ORF names’.<p><a href='/help/gene_name' target='_top'>More...</a></p>Gene namesi

Name:vifUniRule annotation

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been imported from another database using automatic procedures.</p>
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Automatic assertion inferred from database entriesi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section provides information on the name(s) of the organism that is the source of the protein sequence.<p><a href='/help/organism-name' target='_top'>More...</a></p>Organismi

<p>Information which has been imported from another database using automatic procedures.</p>
<p><a href="/manual/evidences#ECO:0000313">More...</a></p>
Automatic assertion inferred from database entriesi

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section shows the unique identifier assigned by the NCBI to the source organism of the protein. This is known as the ‘taxonomic identifier’ or ‘taxid’.<p><a href='/help/taxonomic_identifier' target='_top'>More...</a></p>Taxonomic identifieri

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section contains the taxonomic hierarchical classification lineage of the source organism. It lists the nodes as they appear top-down in the taxonomic tree, with the more general grouping listed first.<p><a href='/help/taxonomic_lineage' target='_top'>More...</a></p>Taxonomic lineagei

<p>This subsection of the <a href="http://www.uniprot.org/help/names_and_taxonomy_section">Names and taxonomy</a> section only exists in viral entries and indicates the host(s) either as a specific organism or taxonomic group of organisms that are susceptible to be infected by a virus.<p><a href='/help/virus_host' target='_top'>More...</a></p>Virus hosti

<p>This section provides information on the location and the topology of the mature protein in the cell.<p><a href='/help/subcellular_location_section' target='_top'>More...</a></p>Subcellular locationi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
<p><a href="/manual/evidences#ECO:0000256">More...</a></p>
Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
<p><a href="/manual/evidences#ECO:0000256">More...</a></p>
Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
<p><a href="/manual/evidences#ECO:0000256">More...</a></p>
Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
<p><a href="/manual/evidences#ECO:0000256">More...</a></p>
Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
<p><a href="/manual/evidences#ECO:0000256">More...</a></p>
Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

Note:In the cytoplasm, seems to colocalize with intermediate filament vimentin. A fraction is associated with the cytoplasmic side of cellular membranes, presumably via the interaction with Pr55Gag precursor. Incorporated in virions at a ratio of approximately 7 to 20 molecules per virion.UniRule annotation

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywords - Cellular componenti

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
<p><a href="/manual/evidences#ECO:0000256">More...</a></p>
Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
<p><a href="/manual/evidences#ECO:0000256">More...</a></p>
Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
<p><a href="/manual/evidences#ECO:0000256">More...</a></p>
Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>This subsection of the <a href="http://www.uniprot.org/help/ptm_processing_section">PTM/processing</a> section describes post-translational modifications (PTMs). This subsection <strong>complements</strong> the information provided at the sequence level or describes modifications for which <strong>position-specific data is not yet available</strong>.<p><a href='/help/post-translational_modification' target='_top'>More...</a></p>Post-translational modificationi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Polyubiquitinated and degraded by the proteasome in the presence of APOBEC3G.UniRule annotation

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
<p><a href="/manual/evidences#ECO:0000256">More...</a></p>
Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Sites

Feature key

Position(s)

DescriptionActions

Graphical view

Length

<p>This subsection describes interesting single amino acid sites on the sequence that are not defined in any other subsection. This subsection can be displayed in different sections (‘Function’, ‘PTM / Processing’, ‘Pathology and Biotech’) according to its content.<p><a href='/help/site' target='_top'>More...</a></p>Sitei

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>UniProtKB Keywords constitute a <a href="http://www.uniprot.org/keywords">controlled vocabulary</a> with a hierarchical structure. Keywords summarise the content of a UniProtKB entry and facilitate the search for proteins of interest.<p><a href='/help/keywords' target='_top'>More...</a></p>Keywords - PTMi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>This section provides information on the expression of a gene at the mRNA or protein level in cells or in tissues of multicellular organisms.<p><a href='/help/expression_section' target='_top'>More...</a></p>Expressioni

Expressed late during infection in a Rev-dependent manner.UniRule annotation

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>This section provides information on the quaternary structure of a protein and on interaction(s) with other proteins or protein complexes.<p><a href='/help/interaction_section' target='_top'>More...</a></p>Interactioni

<p>This subsection of the <a href="http://www.uniprot.org/help/interaction_section">'Interaction'</a> section provides information about the protein quaternary structure and interaction(s) with other proteins or protein complexes (with the exception of physiological receptor-ligand interactions which are annotated in the <a href="http://www.uniprot.org/help/function_section">'Function'</a> section).<p><a href='/help/subunit_structure' target='_top'>More...</a></p>Subunit structurei

Homomultimer; in vitro and presumably in vivo. Interacts with viral RNA and Pr55Gag precursor; these interactions mediate Vif incorporation into the virion. Interacts with the viral reverse transcriptase. Interacts with human APOBEC3F and APOBEC3G. Interacts with host UBCE7IP1 isoform 3/ZIN and possibly with SAT. Interacts with host tyrosine kinases HCK and FYN; these interactions may decrease level of phosphorylated APOBEC3G incorporation into virions. Interacts with host ABCE1; this interaction may play a role in protecting viral RNA from damage during viral assembly. Forms an E3 ligase complex by interacting with host CUL5 and elongin BC complex (ELOB and ELOC). Interacts with host MDM2; this interaction targets Vif for degradation by the proteasome.UniRule annotation

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>This section provides information on sequence similarities with other proteins and the domain(s) present in a protein.<p><a href='/help/family_and_domains_section' target='_top'>More...</a></p>Family & Domainsi

Region

Feature key

Position(s)

DescriptionActions

Graphical view

Length

<p>This subsection of the ‘Family and Domains’ section describes a region of interest that cannot be described in other subsections.<p><a href='/help/region' target='_top'>More...</a></p>Regioni

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
<p><a href="/manual/evidences#ECO:0000256">More...</a></p>
Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Motif

Feature key

Position(s)

DescriptionActions

Graphical view

Length

<p>This subsection of the ‘Family and Domains’ section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>This subsection of the ‘Family and Domains’ section describes a short (usually not more than 20 amino acids) conserved sequence motif of biological significance.<p><a href='/help/motif' target='_top'>More...</a></p>Motifi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>This subsection of the ‘Family and domains’ section provides general information on the biological role of a domain. The term ‘domain’ is intended here in its wide acceptation, it may be a structural domain, a transmembrane region or a functional domain. Several domains are described in this subsection.<p><a href='/help/domain_cc' target='_top'>More...</a></p>Domaini

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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The HCCH motif (H-x5-C-x(18)-C-x5-H) mediates the interaction with CUL5.UniRule annotation

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>This subsection of the ‘Family and domains’ section provides information about the sequence similarity with other proteins.<p><a href='/help/sequence_similarities' target='_top'>More...</a></p>Sequence similaritiesi

<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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<p>Information which has been generated by the UniProtKB automatic annotation system, without manual validation.</p>
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Automatic assertion according to rulesi

<p>This section displays by default the canonical protein sequence and upon request all isoforms described in the entry. It also includes information pertinent to the sequence(s), including <a href="http://www.uniprot.org/help/sequence_length">length</a> and <a href="http://www.uniprot.org/help/sequences">molecular weight</a>.<p><a href='/help/sequences_section' target='_top'>More...</a></p>Sequencei

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is complete or not.<p><a href='/help/sequence_status' target='_top'>More...</a></p>Sequence statusi: Complete.

<p>This subsection of the <a href="http://www.uniprot.org/help/sequences_section">Sequence</a> section indicates if the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> displayed by default in the entry is in its mature form or if it represents the precursor.<p><a href='/help/sequence_processing' target='_top'>More...</a></p>Sequence processingi: The displayed sequence is further processed into a mature form.

<p>The checksum is a form of redundancy check that is calculated
from the sequence. It is useful for tracking sequence updates.</p>
<p>It should be noted that while, in theory, two different sequences could
have the same checksum value, the likelihood that this would happen
is extremely low.</p>
<p>However UniProtKB may contain entries with identical sequences in case
of multiple genes (paralogs).</p>
<p>The checksum is computed as the sequence 64-bit Cyclic Redundancy Check value (CRC64)
using the generator polynomial: x<sup>64</sup> + x<sup>4</sup> + x<sup>3</sup> + x + 1.
The algorithm is described in the ISO 3309 standard.
</p>
<p class="publication">Press W.H., Flannery B.P., Teukolsky S.A. and Vetterling W.T.<br />
<strong>Cyclic redundancy and other checksums</strong><br />
<a href="http://www.nrbook.com/b/bookcpdf.php">Numerical recipes in C 2nd ed., pp896-902, Cambridge University Press (1993)</a>)</p>
Checksum:i401BD3F47DBB6AFA

<p>This section provides links to proteins that are similar to the protein sequence(s) described in this entry at different levels of sequence identity thresholds (100%, 90% and 50%) based on their membership in UniProt Reference Clusters (<a href="http://www.uniprot.org/help/uniref">UniRef</a>).<p><a href='/help/similar_proteins_section' target='_top'>More...</a></p>Similar proteinsi

<p>This section is used to point to information related to entries and found in data collections other than UniProtKB.<p><a href='/help/cross_references_section' target='_top'>More...</a></p>Cross-referencesi

<p>This subsection of the ‘Entry information’ section provides a mnemonic identifier for a UniProtKB entry, but it is not a stable identifier. Each reviewed entry is assigned a unique entry name upon integration into UniProtKB/Swiss-Prot.<p><a href='/help/entry_name' target='_top'>More...</a></p>Entry namei

Q80243_9HIV1

<p>This subsection of the ‘Entry information’ section provides one or more accession number(s). These are stable identifiers and should be used to cite UniProtKB entries. Upon integration into UniProtKB, each entry is assigned a unique accession number, which is called ‘Primary (citable) accession number’.<p><a href='/help/accession_numbers' target='_top'>More...</a></p>Accessioni

<p>This subsection of the ‘Entry information’ section shows the date of integration of the entry into UniProtKB, the date of the last sequence update and the date of the last annotation modification (‘Last modified’). The version number for both the entry and the <a href="http://www.uniprot.org/help/canonical_and_isoforms">canonical sequence</a> are also displayed.<p><a href='/help/entry_history' target='_top'>More...</a></p>Entry historyi

<p>This subsection of the ‘Entry information’ section indicates whether the entry has been manually annotated and reviewed by UniProtKB curators or not, in other words, if the entry belongs to the Swiss-Prot section of UniProtKB (<strong>reviewed</strong>) or to the computer-annotated TrEMBL section (<strong>unreviewed</strong>).<p><a href='/help/entry_status' target='_top'>More...</a></p>Entry statusi

Unreviewed (UniProtKB/TrEMBL)

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